A Novel Fluoride Process for Producing TiO2 from Titaniferous Ore
A Novel Fluoride Process for Producing TiO2 from Titaniferous Ore
复制标题
DOI：
10.1021/ie00040a033
复制
发表时间：
1995
影响因子：
4.2
通讯作者：
T. Pong;J. Besida;T. O'donnell;D. Wood
中科院分区：
文献类型：
--
作者：
T. Pong;J. Besida;T. O'donnell;D. Wood
用四氟化硅作为氟化剂，在700℃以上的温度下从钛铁矿中提取钛(TiF4)，虽然热力学上不利，但通过使用脱溶技术将TIF4从反应区移走，扰乱了体系的平衡，获得了良好的转化率。然后，TiF4通过水解转化为锐钛矿型的二氧化钛。所有的试剂都可以回收利用，废渣中含有少量的氟化物，在处理前只需进行少量处理
Silicon tetrafluoride has been used as a fluoridating agent to extract titanium, as TiF 4 , from ilmenite at temperatures above 700°C. Although the reaction is thermodynamically unfavorable, good conversions are obtained by disturbing the equilibrium of the system through the removal of the TiF 4 from the reaction zone using a desublimation technique. The TiF 4 is then converted by hydrolysis to TiO 2 in the anatase form. All of the reagents can be recycled back into the process and the spent residue, which contains a small level of fluoride, requires only minor treatment before disposal